TY  - CONF
TI  - Modeling the Effect of Rework Timing: Case Study of a Mechanical Contractor
AU  - Feng, Peter P.
AU  - Tommelein, Iris D.
AU  - Booth, Lawrence
AD  - PhD Candidate, Civil and Environmental Engineering. Department, Univ. of California, Berkeley, CA 94720-1712, Phone +1 510/292-9786, FAX +1 510/278-8521, peterfeng@comcast.net
AD  - Director, Project Production Systems Laboratory (http://p2sl.berkeley.edu/) and Professor, Civil and Environmental Engineering Department, 215-A McLaughlin Hall, University of California, Berkeley, CA 94720-1712, Phone +1 510/643-8678, FAX +1 510/643-8919, tommelein@ce.berkeley.edu
AD  - Project Manager, Frank M. Booth, Inc., P.O. Box 5, 222 Third Street, Marysville, CA 95901, Phone +1 530/749-3778, lawrenceb@frankbooth.com
ED  - Tzortzopoulos, Patricia
ED  - Kagioglou, Mike
PY  - 2008
DA  - 2008/07/16
T2  - 16th Annual Conference of the International Group for Lean Construction
C3  - 16th Annual Conference of the International Group for Lean Construction
CY  - Manchester, UK
SP  - 691
EP  - 702
AB  - Design and construction changes often cause rework, increase a project’s cost, and delay its delivery. Data was obtained from a mechanical contractor in order to study rework timing and how it disrupts their detailing, fabrication, and installation processes. A set of simulation models illustrate the impact of rework timing. The focus is on early changes, that is, changes that become known when the contractor is detailing, so they can be dealt with either (1) right away during detailing, (2) during fabrication, or (3) during on-site installation. One model shows that dealing with changes in the detailing phase not only affects that phase but can have negative impacts on installation as well. Another model shows that detailing a project to a set of approved drawings and maintaining those until project completion, forces changes to be pushed downstream to site installation, which makes the impact of those changes more transparent to all players involved and can reduce negative iteration. The question addressed in this paper is: When early changes occur, is there benefit to incorporating them during site installation instead of trying to capture, re-detail, and change drawings? Practitioners can use this research to assess resources to avoid rework.
KW  - changes
KW  - contracts
KW  - detailing
KW  - discrete event simulation
KW  - lean construction
KW  - mechanical contractor
KW  - rework
L1  - https://www.iglc.net/papers/details/564/pdf
UR  - https://www.iglc.net/papers/details/564
DB  - IGLC.net
LA  - English
N1  - Export date: 04 October 2026
ER  -